Elementary Household Chemistry: An Introductory Textbook for Students of Home EconomicsMacmillan, 1914 - 307 σελίδες |
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Σελίδα 16
... boiling in a test tube . While the sulphur is actively boiling , drop in a piece of copper foil . Note what occurs . The great majority of chemical changes are accom- panied by the evolution of more or less heat . In some , the heat is ...
... boiling in a test tube . While the sulphur is actively boiling , drop in a piece of copper foil . Note what occurs . The great majority of chemical changes are accom- panied by the evolution of more or less heat . In some , the heat is ...
Σελίδα 36
... boiling , and stir with a glass rod until all the solid is dissolved . sodium bicarbonate in 20 cc . of cold water . into two exactly equal portions . To one portion of each add enough litmus solution to color it distinctly . Observe ...
... boiling , and stir with a glass rod until all the solid is dissolved . sodium bicarbonate in 20 cc . of cold water . into two exactly equal portions . To one portion of each add enough litmus solution to color it distinctly . Observe ...
Σελίδα 51
... boiling point in about two hours and a half . That , conversely , work can be obtained from heat is illustrated by the steam engine , which is a machine devised for that very purpose . Heat is therefore a form of energy , and the study ...
... boiling point in about two hours and a half . That , conversely , work can be obtained from heat is illustrated by the steam engine , which is a machine devised for that very purpose . Heat is therefore a form of energy , and the study ...
Σελίδα 52
... boiling water and a barrelful of boiling water have exactly the same tem- perature they contain very different quantities of heat . Instruments used to measure quantity of heat are known as calorimeters . ( See p . 55. ) 1 Various units ...
... boiling water and a barrelful of boiling water have exactly the same tem- perature they contain very different quantities of heat . Instruments used to measure quantity of heat are known as calorimeters . ( See p . 55. ) 1 Various units ...
Σελίδα 61
... ( boiling ) this water . The amount of water in the wood depends upon the variety , upon the season at which the wood is cut , and upon the seasoning . Wood cut in midwinter contains less water than that cut at other seasons . No wood is ...
... ( boiling ) this water . The amount of water in the wood depends upon the variety , upon the season at which the wood is cut , and upon the seasoning . Wood cut in midwinter contains less water than that cut at other seasons . No wood is ...
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Συχνά εμφανιζόμενοι όροι και φράσεις
100-Calorie portion acetic acid action alcohol alkali aluminium ammonia ammonium Apparatus atoms bases beaker bisulphite bleaching boiling burning calcium Calories carbohydrates carbon dioxide carbon monoxide cellulose cent per cent CHAPTER chemical change chemistry coal color combustion compounds constituents contain copper cotton crystals dilute dish dissolved dyes elements esters ethyl Experiment Expt ferric fibers filter flame formula fuel value gases glass glucose glycerol grams H₂O hydrochloric acid hydrogen hydrolysis inch insoluble iron limewater liquid liter litmus paper magnesium Materials metal mixture molecules nitrate nitrogen odor ounces oxide oxygen phosphorus piece potassium potassium hydroxide pound powder precipitate Protein Fat Carbo proteins radicle reaction reagent residue salts silk soap soda sodium bisulphite sodium carbonate sodium chloride sodium hydroxide solid soluble starch substances sugar sulphate sulphuric acid temperature test tube tion vegetable washing weight wood wool yield zinc
Δημοφιλή αποσπάσματα
Σελίδα 191 - In the dietary studies made in connection with the nutrition investigations of the Office of Experiment Stations of the United States Department of Agriculture...
Σελίδα 294 - Measures of Length 10 millimeters (mm) =1 centimeter cm 10 centimeters =1 decimeter dm 10 decimeters =1 meter m 10 meters =1 dekameter Dm 10 dekameters =1 hektometer Hm 10 hektometers =1 kilometer Km...
Σελίδα 295 - Measures of Weight 10 milligrams (mg) =1 centigram eg 10 centigrams =1 decigram dg 10 decigrams =1 gram g 10 grams =1 dekagram Dg 10 dekagrams =1 hektogram Hg 10 hektograms =1 kilogram Kg...
Σελίδα 26 - Kelvin has shown that if a drop of water were magnified to the size of the earth the molecules of water would be of a size intermediate between that of a cricket ball and of a marble.